| 摘要 |
PURPOSE:To obtain a lighting system which uses no special device, is not made in a large size, and gives no influence of an error operation and the like to other peripheral apparatuses. CONSTITUTION:A high-frequency lighting circuit A which consists of a capacitor C1, a capacitor C2, a capacitor C3, a switching element Q1, a switching element Q2, and an inductor L1; a rectifier DB; and, a control circuit X to drive the switching element Q1 and the switching element Q2; are provided on a printed substrate P. And a current passage I1 is provided to make the part of the connecting line of the capacitor C2 and the inductor L1, and the part of the connecting line of the negative side of the smoothing capacitor C1 and a discharge lamp La, cross each other, on the printed substarte P. Consequently, a radiant noise generated by the lighting circuit is reduced, a noise preventive circuit and the like are not necessary to prepare, the device is not made in a large size without using a special device, and a bad influence given to the peripheral apparatuses and to the own electron circuit can be prevented. |
